https://blog.wongcw.com/2022/07/02/%e9%a6%96%e6%ac%berisc-v%e7%ad%86%e8%a8%98%e6%9c%acroma%e6%8e%a5%e5%8f%97%e9%a0%90%e8%a8%82%ef%bc%9a4%e6%a0%b8%e8%99%95%e7%90%86%e5%99%a8%e6%9c%80%e9%ab%9816gb256gb/